First dope all areas to be
covered, then sand off the inevitable surface roughness and give a coat of
sanding sealer. Rub this down lightly and then give another coat. Cut out a
piece of nylon 1 inch all round larger than the area for covering. If it is
creased, iron it to make it smooth. Lay it in place . . .

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. . . and gently spray it with
water. It will expand slightly and sag across any open areas such as built-up
wings.

Wait ten minutes for the soaking
to take full effect, and for the full expansion to develop - there will be a
little more sagging.

Now gently rub the edges of the
nylon away from the centre to remove the wrinkles and make the nylon lie
smoothly in place. Do not try to make it tight, just wrinkle-free. If the nylon
shows any signs of drying out give it another gentle spray with water. It has to
remain damp through the whole process.

Brush thinned clear shrinking
dope along the outer edges of the nylon and rub it lightly into the nylon away
from the centre. This will again remove wrinkles or any looseness, but again do
not try to make it tight. It will tighten evenly later when the whole area is
doped. If it is pulled tight before overall doping it will tighten too much
later and will probably develop warps or distort some structural members.

Finally let it dry completely
then give it a coat of shrinking dope. When this has dried the surplus nylon may
be trimmed away from the edges.

In all of this process there is
no need to hurry. The nylon can be kept damp by repeating the water spray if it
shows signs of drying out. While it is damp, take your time. When the edges have
been doped and the nylon is dry it may happen that there will be some small
patch where there is a wrinkle. At this stage it is easy to fix. Damp the whole
area of nylon again, wait for ten minutes, then use thinners or acetone to
release the dope at the edge near the problem. Ease the wrinkles out, make sure
the edges are stuck down again, let it dry and then finish the process as
before.

After the first thin coat of
shrinking dope another coat is recommended, followed by a full coat of
non-shrinking dope. After that the nylon is sealed and flyable; all it needs is
a colour scheme and, for glow engines, fuel proofing.